3rd house in astrology: the Goddess, siblings, and speech

Vettius Valens titles a chapter “house III, the place of the Moon goddess” (Anthology, book II, chapter 14). In his table of the names of the places (chapter 16), the Goddess signifies the mother, just as the God, the 9th house opposite, signifies the father. Firmicus Maternus takes up the name (Mathesis, book II, chapter 19): “to this place the name of Goddess; it is the place of the one who travels.”

Lilly makes it the joy of the Moon (Christian Astrology, book I, chapter VII, p. 52). If the Moon is there, especially in a movable sign, it is for him a sign of much travel, of comings and goings, of a life that is seldom settled. The Moon, the swiftest body, is happy in the house of movement.

The lists look alike from one century to the next. Valens gives siblings, journeys abroad, friends, relatives in the broad sense, income (book IV, chapter 12). Firmicus: siblings and friends. Lilly: brothers, sisters, cousins and kindred, neighbors, small journeys or inland journeys, frequent changes of place, epistles, letters, rumors, messengers. Al-Biruni adds short journeys, intelligence and knowledge (Book of Instruction, § 461).

The modern reading draws a coherent area from all this: the way you gather and pass on information around you, your curiosity, your first intellectual tools, your ties with siblings and neighbors, short trips. It is near knowledge, facing the distant knowledge of the 9th house: gathering and communicating on one side, interpreting and making meaning on the other.

The 3rd house is cadent: it follows a succedent house and prepares the next angle. Its role is to adapt, connect and distribute. But not all cadent houses are equal. Firmicus remarks that the 3rd is the first house to join the Ascendant, through a light connection, by sextile. Al-Biruni says it in his own way (§ 499): the 3rd and the 9th are cadent, but the 6th and the 12th are, on top of that, unconnected to the Ascendant, hence their heavier reputation.

Lilly draws a surprising ranking from this: in his order of strength (chapter VI, p. 48), the 9th and the 3rd come before the succedent 2nd and 8th. He gives the 3rd house two consignificators, Gemini and Mars, and concludes that Mars is not very unfortunate there, unless joined to Saturn.

The modern natural wheel pairs the 3rd house with Gemini and Mercury. Gemini is already in Lilly. In your chart, though, it is the sign on the cusp that gives the color.

The houses are calculated in Placidus, and the “House cusps” table in chapter I gives the position of the 3rd house, its sign and its ruler, taken from modern rulerships. A planet occupying it stands out there: its nature colors the way you speak, learn and get around. An empty 3rd house is read through its ruler.

In chapter IV, the Mind & learning section reads Mercury and its dispositor, the 3rd house, Pallas, and Uranus or Saturn when they touch Mercury: the way you think, learn and decide. Pallas is read only there within Life Domains.

Each planet brings its own manner: Mars gives direct, lively speech, Saturn rigorous and measured communication, Venus a taste for harmonious exchanges, the Moon a way of thinking that shifts with the mood. On the 3-9 axis, a planet in the 3rd house can also shed light on the way your convictions take shape from what you learn every day.

For Camille Morel, AstralPro's sample chart (fictional data), the cusp of the 3rd house is at 22°06' Capricorn. Its ruler, Saturn, is the same in both systems, and it sits in this very house, at 23°53' Aquarius: the area is governed on the spot. The house is wide, since the next one only begins at 0°15' Pisces, and it contains the whole of Aquarius, without that sign carrying a cusp.

Aquarius shows the gap between the two tables. For tradition, it is a domicile of Saturn. In modern rulerships, it belongs to Uranus: Saturn is peregrine there (a dash in the Dignity column of the positions table), and its dispositor is Uranus, in the 2nd house.

Two celestial points fall there too. Pallas, at 24°10' Aquarius, feeds Mind & learning. Éros, at 10°25' Aquarius, comes out as “position only” and joins Love life. Mercury, for its part, is in Scorpio, retrograde, in the 12th house, with Pluto as its dispositor. For Mind & learning, the report selects the Sun square Saturn, orb 1°58', applying. And the Moon, which tradition has rejoicing in the 3rd house, is here in the 1st house.

Since Placidus houses are unequal, a wide house can contain an entire sign without any cusp landing in it. This is the case with Camille's Aquarius, held entirely within her 3rd house. Some astrologers then give the house a second ruler, that of the intercepted sign. AstralPro keeps to the rule of the cusp sign: one house, one ruler.

The consequence is visible in the summary of rulers. Uranus, modern ruler of Aquarius, rules no house in Camille's chart; nor does the Sun, since Leo is intercepted in the same way in her 9th house, directly opposite. These two planets keep their place in the positions table and their aspects, but no Life Domains section calls on them as a house ruler.

If your own 3rd house contains an intercepted sign, you will see it by comparing two rows of the cusps table: the 3rd house begins in one sign, and the 4th house in a sign that is not the next one.